The roughly 10,200-acre Rim Fire is creeping closer to Camp Mather and has forced the closure of state Highway 120, the main route to the camp.

Two hundred senior citizens from San Francisco were evacuated from a special event week at Camp Mather as the Rim Fire continues to spread, threatening thousands of structures.

Elton Pon, a spokesman for San Francisco's Recreation and Park Department, which operates Camp Mather, confirmed that the seniors are being evacuated out of an "abundance of caution." The seniors arrived Sunday and were scheduled to stay through Thursday.

The fire, which began Saturday, is located roughly 3 miles from Groveland, nearly 20 miles from Camp Mather, in the Stanislaus National Forest. The fire is roughly 10,200 acres, with none of it contained as of Tuesday, according to the U.S. Forest Service.

The fire has forced the closure of state Highway 120, which is the main route to Camp Mather and the western entrance to Yosemite National Park.

A group of roughly 40 teens in the juvenile justice system was expected to arrive at Camp Mather later this week, but that has been postponed and is expected to be rescheduled, according to Pon.